If in two triangles,the corresponding angles are equal, i.e the two triangles are equiangular then their corresponding sides are proportional and the triangles are similar.
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If in two triangles,the corresponding angles are equal, i.e the two triangles are equiangular then their corresponding sides are proportional and the triangles are similar.


 यदि दो त्रिभुजों के संगत कोण बराबर हो ,अर्थात दो त्रिभुज समकोणिक हो तो उनकी संगत भुजाएँ समानुपाती होती हैं एवं त्रिभुज समरूप होते हैं। (A-A-A) समरूपता 

 Let in △ABC and △PQR

given A=P ,B=Q ,C=R

we have to prove that △ABC~ △PQR

Both triangle have in Three condition

condition-1, AB=PQ

condition-2, AB>PQ

condition-3, AB<PQ

condition-1, AB=PQ..............(i)

given  A=P ............(ii)

            B=Q.............(iii)

Now From congurent A-S-A ,

 △ABC ≅△PQR

then  AB=PQ

         BC=QR

         AC=PR

also write this (AB/PQ)= (BC/QR)=(AC/PR)=1

               and given A=P ,B=Q ,C=R

hence, △ABC~ △PQR proved..(Why...)

condition-2, AB>PQ






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